JEE Main 2022 · 25 Jul · Shift 2 · Chemistry Q62

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ChemistrySingle correct+4 / -1Question 62 of 90

Two solutions A and B are prepared by dissolving 1 g of non-volatile solutes X and Y, respectively in 1 kg of water. The ratio of depression in freezing points for A and B is found to be 1:4. The ratio of molar masses of X and Y is

1:4

1:0.25

1:0.20

1:5

Answer and worked solution

Official answer: B

$\Delta T_f\propto\frac1M$ for equal mass: $M_X:M_Y=4:1=1:0.25$ .

(B)

Topics:Colligative properties

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JEE Main 2022 · 25 Jul · Shift 2, Chemistry question 62